Metal and rubber track belt



A. KGRESSE METAL AND RUBBER 'TRACK BELT Filed April 5. 1929 Dec. 3o, 1930. 1,186,539

2 Sheets-Sheet 1 Dec. 30, 1930. A; KEGREssE 1,786,539'

METAL AND RUBBER TRACK BELT Filed April 5. 1929 2 shams-sheet 2 4" 7 wwf/fron.-

/QioZ/e /e' ressa Patented D ec. 30, 1930 PATENT OFFICE.

. nonna xEeaEssE, or coUmzEvora, manca EETAL am) RUBBER TRACK BELT Application med April 5, 1929, Serial No. 852,709, and in France April 20, 1928.

In the known metal-and-'rubber track belts, the Aendless band which forms the body of the belt and eiiects the traction, serves also as a track for the rollers, which latter, by rolling upon the band, damage the same.

This'invention concerns a novel metal-andrubber belt in which two endless strips form the body of the belt and provide forits traction without being subjected to the action of the rollers.

Two embodiments of the invention are shown by way of example in the appended drawings, in which Figure 1 is a side elevational view form or embodiment.

Figure 2 is a cross sectional view thereof, and Figure 3 is a cross sectional view of another form which is now deemed preferred.

l designates the rollers in Figs. 1 and 2,

and 1 the twin-rollerin Fig. 3.

The belt, speaking generally, consists of two endless strips 2 providing for traction and arranged parallel vwith each other, a space being left free between them.

Arranged crosswise ofthe strips 2 and in nearl Contactin relation with one another are p ates 3 by w ich the strips are connected to each otherv and maintained in the desired of one spaced relation. 'Ihese strips 2 are secured- '30 upon the plates 3 b means of bolts 7 which,

L at the same time, old'the positive driving prongs 8k in position upon thestrips. The`Y prong rows 8 occupy only art of the breadth ofthe endless strips 2; 't e surfaces which Iremain free (see Figures 2 and 3) serving as bearing surfaces for the pulleys by which the structure. is supported. The driving pulley 9 (see Figure 1) is formed with recesses 12 (see Figs. 1 and 2) suited to prongs 8. 4 Arranged between the endless strips 2 are the guiding means'Y which may consist of U-shaped members 5 cast integral with the lates or secured thereto, as shown in Figure g, for instance by means of rivets or countersunk bolts 10.

In the form shown in Figure 3, however, the guiding means on each late 3 consists of a single rib 6 either cast integral with the plate or secured thereto by known means.

Arranged upon the opposite face of plates 3 are the ground engaging blocks (see 4 in Figs. 1 and 2, and 4 in Fig. 3) which are made of a plastic material.

The track for the rollers is provided, in the case of Figure 2, by the inner faces of the U.shaped members 5. The dimension of the base of the U-shaped member lengthwise of the -belt is equal to the width of the plates of the belt, as may be seen by reference to' Figure 1. 0U

In the form shown in Figure 3, the track for the twin-roller members on either side of the guiding rib 6 is provided by plates 3 themselves. On even ground, a smooth surface is thus formed over which the rollers may pass without any impact of one belt member upon the next one.

The guiding of the belt around the idle pulleys 1 i's provided for, as shown in Figure 2, .by the U-shaped members 5. In the case of Figure 3, the guiding of the pulleysl is afforded by the'central ribs 6, as in the known track belts. f

' In the form shown in Figure 2, the endless strips 2 bear laterally against the side memi bers of the UA-shaped guides 5, whereby foreign matter is prevented from entering between the strips 2 and said guides 5. The eiiect of this is that the general structure of the belt is strengthened in that the plates are prevented fromy assuming diagonal positions. 'r As may bewsreen from the above description, the endless stripsy which effect the traction of the belt are not subjected to the destructive effects of the rollers and are thus capable of performing a much longer service than when the rollers run on them.

I claim as my invention 1. An endless track belt for use inconnec. tion with `a driving pulley provided with peripheral recesses, and a series of supporting rollers; said belt composed of a pair of endless strips arranged-side by side in spaced, parallel relation; metal connecting plates arranged transversely of the belt in substanr tially contacting relation with one anotheralong their longitudinal edges and fastened to the outer faces of said strips; a longitudil nal row of driving projections arranged centrally on'the inner face of each strip for re- 1*9 ception i the recesses in the drivin pulleg; ground-engaging blocks connecter? .to t e outer faces of said metal plates; and bolts to connect the strips and rows of drivin projections to the inner faces of said meta plates; and a, longitudinal row of guide members for the supporting rollers secured between the two strips at the central portions of said connecting plates.

2. A track belt according to claim 1, in which/the 'de members for the supporting rollers eac consists of a single rib rigidly secured to the connecting plates.

3. A track belt accordlng to claim 1, in which each supporting roller comprises a pair of laterally-spaced members, and in which the guide members embody ribs secured to the connecting plates and arranged to pass freely through the spaces between the members of 0 the rollers. 

